Transmission Oil Pressure Sensor Circuit High
Indicates a high voltage in the transmission oil pressure sensor circuit.
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What it means (plain English)
The transmission oil pressure sensor measures how much pressure is in your transmission fluid, and too much voltage means the sensor thinks there's a problem with the pressure.
What the computer is actually seeing
The computer monitors the voltage from the transmission oil pressure sensor. A reading above 4.5 volts indicates a fault in the circuit.
What a healthy reading looks like
Expected voltage from the sensor should be between 0.5 and 4.5 volts when the system is operating normally.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Check the transmission fluid level; it should be within the specified range when warm. If low, fill to the correct level and retest.
- 22. Inspect the wiring and connectors to the transmission oil pressure sensor for any signs of damage or corrosion. Repair as necessary.
- 33. With the engine running, check the output voltage of the transmission oil pressure sensor. It should be between 0.5 and 4.5 volts. If it's above 4.5 volts, replace the sensor.
- 44. If the sensor is within the correct range, test the resistance of the wiring harness from the sensor to the TCM. If you find high resistance, repair the wiring.
- 55. Finally, if wiring is good and sensor is functioning, consider testing or replacing the TCM.
Common causes
- Wiring harness short to power
- Faulty transmission oil pressure sensor
- Corroded or bad electrical connector
- Low transmission fluid level
- Faulty transmission control module (TCM)
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
It's recommended to fix this code soon, as it can affect shifting and performance.
Will this code come back after clearing it?
If the underlying issue isn't resolved, the code will likely return.
Why does this code pair with others like SPN 3635?
Codes can pair due to related sensors, like the pressure and temperature sensors both impacting transmission performance.
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